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Manual Scilab >> API Scilab > Low level functions > Integer writing (Scilab gateway)

Integer writing (Scilab gateway)

How to write matrices of integers in a gateway.

Create from existing data.

Calling Sequence

Input argument profile:

Signed integer :

SciErr createMatrixOfInteger8(void* _pvCtx, int _iVar, int _iRows, int _iCols, const char* _pcData8)
SciErr createMatrixOfInteger16(void* _pvCtx, int _iVar, int _iRows, int _iCols, const short* _psData16)
SciErr createMatrixOfInteger32(void* _pvCtx, int _iVar, int _iRows, int _iCols, const int* _piData32)

Unsigned integer :

SciErr createMatrixOfUnsignedInteger8(void* _pvCtx, int _iVar, int _iRows, int _iCols, const unsigned char* _pucData8)
SciErr createMatrixOfUnsignedInteger16(void* _pvCtx, int _iVar, int _iRows, int _iCols, const unsigned short* _pusData16)
SciErr createMatrixOfUnsignedInteger32(void* _pvCtx, int _iVar, int _iRows, int _iCols, const unsigned int* _puiData32)

Named variable profile:

Signed integer :

SciErr createNamedMatrixOfInteger8(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const char* _pcData8)
SciErr createNamedMatrixOfInteger16(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const short* _psData16)
SciErr createNamedMatrixOfInteger32(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const int* _piData32)

Unsigned integer :

SciErr createNamedMatrixOfUnsignedInteger8(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const unsigned char* _pucData8)
SciErr createNamedMatrixOfUnsignedInteger16(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const unsigned short* _pusData16)
SciErr createNamedMatrixOfUnsignedInteger32(void* _pvCtx, const char* _pstName, int _iRows, int _iCols, const unsigned int* _puiData32)

Arguments

_pvCtx

Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h.

_iVar

Position in the Scilab memory where you want to put the variable

_pstName

Name of the variable for "named" functions.

_iRows

Number of rows of the new variable

_iCols

Numbers of columns of the new variable

_pcData8, _psData16, _piData32, _pucData8, _pusData16, _puiData32

Address of data array (size: _iCols * _iRows)

SciErr

Error structure where is stored errors messages history and first error number.

Write directly in Scilab memory.

Calling Sequence

Input argument profile:

Signed integer :

SciErr allocMatrixOfInteger8(void* _pvCtx, int _iVar, int _iRows, int _iCols, char** _pcData8)
SciErr allocMatrixOfInteger16(void* _pvCtx, int _iVar, int _iRows, int _iCols, short** _psData16)
SciErr allocMatrixOfInteger32(void* _pvCtx, int _iVar, int _iRows, int _iCols, int** _piData32)

Unsigned integer :

SciErr allocMatrixOfUnsignedInteger8(void* _pvCtx, int _iVar, int _iRows, int _iCols, unsigned char** _pucData8)
SciErr allocMatrixOfUnsignedInteger16(void* _pvCtx, int _iVar, int _iRows, int _iCols, unsigned short** _pusData16)
SciErr allocMatrixOfUnsignedInteger32(void* _pvCtx, int _iVar, int _iRows, int _iCols, unsigned int** _puiData32)

Arguments

_pvCtx

Scilab environment pointer, pass in "pvApiCtx" provided by api_scilab.h.

_iVar

Position in the Scilab memory where you want to put the variable

_iRows

Number of rows of the new variable

_iCols

Numbers of columns of the new variable

_pcData8, _psData16, _piData32, _pucData8, _pusData16, _puiData32

Returns address of data array (size: _iCols * _iRows)

SciErr

Error structure where is stored errors messages history and first error number.

Description

This help describes how matrix of integers can be handled through the Scilab API.

Two types of functions can be used to write in the memory of Scilab.

Gateway Source

void* create_output(int _iCoeff, int _iSize, int _iRows, int _iCols, void* _pvDataIn);

int read_integer(char *fname,unsigned long fname_len)
{
    SciErr sciErr;
    //output variable info
    int iRows8                    = 0;
    int iCols8                    = 0;
    int iRows16                    = 0;
    int iCols16                    = 0;
    int iRows32                    = 0;
    int iCols32                    = 0;
    int iRowsu8                    = 0;
    int iColsu8                    = 0;
    int iRowsu16                = 0;
    int iColsu16                = 0;
    int iRowsu32                = 0;
    int iColsu32                = 0;
    int iPrec                    = 0;

    int* piAddr8                = NULL;
    int* piAddr16                = NULL;
    int* piAddr32                = NULL;
    int* piAddru8                = NULL;
    int* piAddru16                = NULL;
    int* piAddru32                = NULL;

    char* pcData                = NULL;
    short* psData                = NULL;
    int* piData                    = NULL;
    unsigned char* pucData        = NULL;
    unsigned short* pusData        = NULL;
    unsigned int* puiData        = NULL;

    char* pcDataOut                = NULL;
    short* psDataOut            = NULL;
    int* piDataOut                = NULL;
    unsigned char* pucDataOut    = NULL;
    unsigned short* pusDataOut    = NULL;
    unsigned int* puiDataOut    = NULL;

    //check input/ouput arguments count
    CheckRhs(6,6);
    CheckLhs(6,6);

    //get varialbe address
    sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr8);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = getVarAddressFromPosition(pvApiCtx, 2, &piAddru8);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = getVarAddressFromPosition(pvApiCtx, 3, &piAddr16);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = getVarAddressFromPosition(pvApiCtx, 4, &piAddru16);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = getVarAddressFromPosition(pvApiCtx, 5, &piAddr32);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    sciErr = getVarAddressFromPosition(pvApiCtx, 6, &piAddru32);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddr8, &iPrec);
    if(sciErr.iErr || iPrec != SCI_INT8)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddru8, &iPrec);
    if(sciErr.iErr || iPrec != SCI_UINT8)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddr16, &iPrec);
    if(sciErr.iErr || iPrec != SCI_INT16)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddru16, &iPrec);
    if(sciErr.iErr || iPrec != SCI_UINT16)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddr32, &iPrec);
    if(sciErr.iErr || iPrec != SCI_INT32)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //check variable precision
    sciErr = getMatrixOfIntegerPrecision(pvApiCtx, piAddru32, &iPrec);
    if(sciErr.iErr || iPrec != SCI_UINT32)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfInteger8(pvApiCtx, piAddr8, &iRows8, &iCols8, &pcData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfUnsignedInteger8(pvApiCtx, piAddru8, &iRowsu8, &iColsu8, &pucData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfInteger16(pvApiCtx, piAddr16, &iRows16, &iCols16, &psData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfUnsignedInteger16(pvApiCtx, piAddru16, &iRowsu16, &iColsu16, &pusData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfInteger32(pvApiCtx, piAddr32, &iRows32, &iCols32, &piData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //retrieve dimensions and data
    sciErr = getMatrixOfUnsignedInteger32(pvApiCtx, piAddru32, &iRowsu32, &iColsu32, &puiData);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //alloc and fill new variable
    pcDataOut   = (char*)create_output(2, 1, iRows8, iCols8, (void*)pcData);
    pucDataOut  = (unsigned char*)create_output(4, 1, iRowsu8, iColsu8, (void*)pucData);
    psDataOut   = (short*)create_output(8, 2, iRows16, iCols16, (void*)psData);
    pusDataOut  = (unsigned short*)create_output(16, 2, iRowsu16, iColsu16, (void*)pusData);
    piDataOut   = (int*)create_output(32, 4, iRows32, iCols32, (void*)piData);
    puiDataOut  = (unsigned int*)create_output(64, 4, iRowsu32, iColsu32, (void*)puiData);

    //create new variable
    sciErr = createMatrixOfInteger8(pvApiCtx, Rhs + 1, iRows8, iCols8, pcDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //create new variable
    sciErr = createMatrixOfUnsignedInteger8(pvApiCtx, Rhs + 2, iRowsu8, iColsu8, pucDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //create new variable
    sciErr = createMatrixOfInteger16(pvApiCtx, Rhs + 3, iRows16, iCols16, psDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //create new variable
    sciErr = createMatrixOfUnsignedInteger16(pvApiCtx, Rhs + 4, iRowsu16, iColsu16, pusDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //create new variable
    sciErr = createMatrixOfInteger32(pvApiCtx, Rhs + 5, iRows32, iCols32, piDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //create new variable
    sciErr = createMatrixOfUnsignedInteger32(pvApiCtx, Rhs + 6, iRowsu32, iColsu32, puiDataOut);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //assign allocated variables to Lhs position
    LhsVar(1) = Rhs + 1;
    LhsVar(2) = Rhs + 2;
    LhsVar(3) = Rhs + 3;
    LhsVar(4) = Rhs + 4;
    LhsVar(5) = Rhs + 5;
    LhsVar(6) = Rhs + 6;
    return 0;
}

void* create_output(int _iCoeff, int _iSize, int _iRows, int _iCols, void* _pvDataIn)
{
    int i = 0;
    void* pvDataOut = (void*)malloc(_iSize * _iRows * _iCols);
    for(i = 0 ; i < _iRows * _iCols ; i++)
    {
        int iVal = 0;
        memcpy(&iVal, (char*)_pvDataIn + i * _iSize, _iSize);
        iVal *= _iCoeff;
        memcpy((char*)pvDataOut + i * _iSize, &iVal, _iSize);
    }
    return pvDataOut;
}

Scilab test script

a8  = int8([    1   -2  3   -4  5; ..
                -6  7   -8  9   -10; ..
                11  -12 13  -14 15]);

au8 = uint8([   1   2   3   4   5; ..
                6   7   8   9   10; ..
                11  12  13  14  15]);

a16  = int16([  1   -2  3   -4  5; ..
                -6  7   -8  9   -10; ..
                11  -12 13  -14 15]);

au16 = uint16([ 1   2   3   4   5; ..
                6   7   8   9   10; ..
                11  12  13  14  15]);

a32 = int32([   1   -2  3   -4  5; ..
                -6  7   -8  9   -10; ..
                11  -12 13  -14 15]);

au32 = uint32([ 1   2   3   4   5; ..
                6   7   8   9   10; ..
                11  12  13  14  15]);

[c8, cu8, c16, cu16, c32, cu32] = read_integer(a8, au8, a16, au16, a32, au32);

if or(c8 <> a8 * 2) then error("failed"), end
if or(cu8 <> au8 * 4) then error("failed"), end
if or(c16 <> a16 * 8) then error("failed"), end
if or(cu16 <> au16 * 16) then error("failed"), end
if or(c32 <> a32 * 32) then error("failed"), end
if or(cu32 <> au32 * 64) then error("failed"), end
<< Integer reading (Scilab gateway) Low level functions Pointer reading (Scilab gateway) >>
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with contributors 		Last updated:
Wed Jan 26 16:24:43 CET 2011